Soil stoichiometric ratio and its effect on carbon release potential of Jasminum sambac plantations in Fuzhou
Wang Xuming, Zeng Dongping, Min Qingwen, Tong Chuan, Wang Weiqi, Zhang Yongxun, Zheng Jiangmin
1. College of Geographical Sciences,Fujian Normal University, 350007, Fuzhou, China; 2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101, Beijing, China; 3. Agricultural Bureau of Fuzhou City, 350005, Fuzhou, China
Abstract：We selected organic Jasminum sambac plantation, common J. sambac plantation and J. sambac + Dimocarpus longan interplanting plantation as research objects in order to clarify the effect of different planting patterns on soil stoichiometric ratio and carbon release potential of J. sambac plantations. The soil total carbon (TC), total nitrogen (TN), total phosphorus (TP), total potassium (TK) mass fractions and carbon dioxide (CO2 ) release potential were measured. Results showed that: 1) mass ratios of soil carbon to nitrogen (C/ N) in the above-mentioned plantations were 11.33, 10.93, 9.48; carbon to phosphorus ratios (C/ P) were 23.23, 25.33, 10.91; carbon to potassium ratios (C/ K) were 1.02, 0.88, 1.66; nitrogen to phosphorus ratios (N/ P) were 2.05, 2.32, 1.14; nitrogen to potassium ratios (N/ K) were 0.09, 0.08, 0.17; phosphorus to potassium ratios (P/ K) were 0.04, 0.03, 0.15, respectively. 2) Soil C/ N ratio in the three J. sambac plantations followed the order of organic J. sambac plantation > common J. sambac plantation > J. sambac + D. longan interplanting plantation. Soil N/ P ratio was significantly lower in organic J. sambac plantation than in common J. sambac plantation, while soil P/ K ratio was the opposite. Soil C/ P and N/ P ratios were significantly lower in J. sambac + D. longan interplanting plantation than in common J. sambac plantation, while the opposite was true for soil C/ K, N/ K and P/ K ratios. 3) Soil CO2 release potentials were 5.80, 3.79 and 4.92 μg/ (g·d) in the three J. sambac plantations, respectively, but the difference was not significant. The soil C/ P, C/ K, N/ P and N/ K ratios of J. sambac + D. longan interplanting plantation were indicative to certain degree to the CO2 release potential in the profile. Interplanting-organic combination is a more reasonable planting pattern of J. sambac cropping systems in Fuzhou.
福州市科技计划项目“花杆还田对福州茉莉花农业文化遗产种植系统土壤固碳的调控技术研究”(2014 G 66)
引用本文:
汪旭明1,曾冬萍1,闵庆文2,仝川1,王维奇1,张永勋2,郑江闽3. 福州茉莉花种植园土壤化学计量比及其对碳释放潜力的影响[J]. 中国水土保持科学, 2015, 13(1): 118-126.
Wang Xuming, Zeng Dongping, Min Qingwen, Tong Chuan, Wang Weiqi, Zhang Yongxun, Zheng Jiangmin. Soil stoichiometric ratio and its effect on carbon release potential of Jasminum sambac plantations in Fuzhou. SSWCC, 2015, 13(1): 118-126.
2015, Vol. 13 
